APPENDIX. 159 



B O L E T I. 



BOLETUS coriaceus fubftipitatus glaber dimidiatus, came alba* 

 tubis brevifjirnis niveis came feparabilibus. Bnlliard text. 

 JP.348. JV0.28. 



BIRCH BOLETUS. 



TAB. CLIX. 



THIS Boletus, in the fpecimen before me, has a very fhort 

 ftem, which rifes obliquely, from the upper furface, over 

 the defective fide of the plant, as is reprefented in the fimple out- 

 lines on the plate ; but fometimes it adheres by its fide, and this 

 fpurious ftem is abfent. The furface is of a pale kind of brown, 

 with a tinge of red, but this colour effects only a thin lkin or 

 epidermis, with which the plant is covered, and which frequently 

 cracks and peels off in fmall patches, leaving the furface marked 

 with fpots and blotches of a pure white, as is the internal whole 

 fubftance of the plant ; when old the margin is obtufe and rolled 

 in, and the furface of the plant highly convex. 



The lower furface is nearly plain, the pores white and minute, 

 the tubes very fhort and white, and while frefh may be feparated 

 from the flefh of the pileus. 



This grew on birch trees in Shacileton-Wood, near Heptonjlall » 

 and the fame has been fent me from Darlington* 



CCVII. 



Irtuliiius, 



